Volume 136, Issue 1 e202316103
Zuschrift

Methylene C(sp3)−H Arylation Enables the Stereoselective Synthesis and Structure Revision of Indidene Natural Products

Dr. Anton Kudashev

Dr. Anton Kudashev

University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056 Basel, Switzerland

These authors contributed equally to this work.

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Dr. Stefania Vergura

Dr. Stefania Vergura

University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056 Basel, Switzerland

These authors contributed equally to this work.

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Dr. Marco Zuccarello

Dr. Marco Zuccarello

University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056 Basel, Switzerland

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Prof. Dr. Thomas Bürgi

Prof. Dr. Thomas Bürgi

University of Geneva, Department of Physical Chemistry, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland

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Prof. Dr. Olivier Baudoin

Corresponding Author

Prof. Dr. Olivier Baudoin

University of Basel, Department of Chemistry, St. Johanns-Ring 19, 4056 Basel, Switzerland

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Dedicated to Thomas Ward on the occasion of his 60th birthday
First published: 23 November 2023

Abstract

The divergent synthesis of two indane polyketides of the indidene family, namely (±)-indidene A (11 steps, 1.7 %) and (+)-indidene C (13 steps, 1.3 %), is reported. The synthesis of the trans-configured common indane intermediate was enabled by palladium(0)-catalyzed methylene C(sp3)−H arylation, which was performed in both racemic and enantioselective (e.r. 99 : 1) modes. Further elaboration of this common intermediate by nickel-catalyzed dehydrogenative coupling allowed the rapid installation of the aroyl moiety of (±)-indidene A. In parallel, the biphenyl system of (±)- and (+)-indidene C was constructed by Suzuki–Miyaura coupling. These investigations led us to revise the structures of indidenes B and C.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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